package com.littlehu.test15;

public class ProxyImage implements Image{
	
	private RealImage realImage;
	private String fileName;

	
	public ProxyImage(String fileName) {
		this.fileName=fileName;
	}
	@Override
	public void display() {
		if (realImage==null) {
			realImage=new RealImage(fileName);
			
		}
		realImage.display();
		
	}
	

}
